Sony BP-U60 Rechargeable Lithium-ion 14.4 volt, 56Wh Battery Pack for the XDCAM EX Camcorders Rechargeable Lithium-ion Battery Pack for PMW-EX1/EX3 and PHU-60K. BP-U60 also has LED displays to indicate the remaining capacity of the battery at the push of a button on the battery itself.